Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d056916f384c631…

MALICIOUS

PDF

79.8 KB Created: 2021-05-18 16:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8e4c6a7e7c53d68dc2f6d58cf5a0c993 SHA-1: d3ba2b025bae80135b7861c5565e5f297d209a96 SHA-256: 9d056916f384c631ebadaacb8b10d7b07d37c4c488faca2dc3b32a0fd2a2ab16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/ziseses.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_604762ca67006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411501/normal_605579e3c66c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_6028eb1ab0376.pdfIn PDF document text
    • https://bozaxadoduzake.weebly.com/uploads/1/3/4/3/134306622/pefurazujad-pumaruminu-bixafilifenek.pdfIn PDF document text
    • https://wufikasuruxur.weebly.com/uploads/1/3/1/6/131636700/3048685.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/fe3f1d0f30274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5ffbc7386b6f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_603c274a44f1a.pdfIn PDF document text
    • https://solawelosadi.weebly.com/uploads/1/3/1/8/131857655/8549007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/4NO0L8wlyOA/wb?keyword=seth%20meyers%20net%20worthPDF link annotation
    • https://uploads.strikinglycdn.com/files/d1215cce-f088-4821-a3fb-d1511ff9cb8d/34476258946.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/42768496965.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/52989789898.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/6360235466.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/gartner_ppm_magic_quadrant_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc0852c-4e37-47d0-8e6b-3a96ecaa565d/where_to_put_water_pan_in_electric_smoker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60786e6c-b7e7-4626-a32f-3137adad5038/35727128181.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/65592126393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b55f49-61da-4455-93f0-a771d71535eb/davomajif.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/cst_c_form_upload.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/53090491819.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/run_android_apps_on_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24c55d1-1a3d-48e7-ace9-ef1d5f18b298/jowixenarada.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/28992986089.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB2 4980 bytes
SHA-256: 25aa3d265d1bca9deb5732f39dbf07a0c086d7cf7a9eb1da698ba33f31dcda24
font_01_sfnt_off00010c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8A 10940 bytes
SHA-256: 68cad37848b416fc807e500bf43197ff42419ea4b65a426fdf284ad991a7e4c1

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